{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Highly selective separation of arsenite species [ As ( III ) ] was achieved by chelation with sodium diethyldithiocarbamate ( DDTC ) followed by dispersion with 40 mg of 1 - octyl - 3 - methylimidazolium hexafluorophosphate ( [ C ( 8 ) mim ] [ PF ( 6 ) ] ) IL ."}
{"Chemical": ["arsenite", "As ( III )", "sodium diethyldithiocarbamate", "DDTC", "1 - octyl - 3 - methylimidazolium hexafluorophosphate", "[ C ( 8 ) mim ] [ PF ( 6 ) ]"]}